Tulisa Contostavlos is allegedly fuming after losing will.i.am and Britney Spears' hit song 'Scream & Shout' to the pair.
The N-Dubz singer apparently co-wrote the track, originally called 'I Don't Give A F**k', with Black Eyed Peas record producer Jean Baptiste and recorded it before Britney was considered for the tune.
However, before the song made it onto Tulisa's debut solo album, The Female Boss, will.i.am removed Tulisa's parts, re-wrote it and asked Britney to record her vocals for the release.
A source told The Sun: "The song was due to be Tulisa's third single from her album until Will told his protege Jean that he wanted the beat for him and Britney.
"Tulisa's team thought it was a surefire hit but, after losing the battle for the rights, they were forced to release 'Sight Of You' which only got to No. 18.
"She now has to watch on as the song goes top five around the world.
"At one point Tulisa was even considering releasing her version to rival 'Scream & Shout', but now it's unlikely to see the light of day unless it gets leaked."